Customize image sizes, create more image sizes to show in post insert-image dialog, choose to crop or not.

wordpress.org/plugins/simple-image-sizes­

32

Ultimate Maintenance Mode

Automatically makes a dimmed version of screenshot, adds customizable text message on top for "down for maintenance" or "coming soon." Meanwhile, logged-in user has access to site, while visitors to any page get maintenance page.

wordpress.org/plugins/ultimate-maintenance-mode­

33

Events Manager

bulky and steep learning curve

34

Use Google Libraries

Makes it simple to serve javascript libraries like jQuery etc. from Google's servers instead of your own host.

wordpress.org/plugins/use-google-libraries­

35

36

Alphonso:

37

WP Mail (can control all your email through SMTP, also has a test facility and a log)